Are you aware that smoking used to be allowed on planes? We didn't stop allowing it because of a rash of airplane fires either.

Yes, I'm fully aware. And it is emphatically irrelevant. It's kind of ridiculous to suggest the original motivations for the rule somehow render the associated risks on people's safety, lives, and properties permanently ineligible for consideration.

Japanese pilots still smoke every flight

The lack of cigarettes on a plane isn't due to the fire hazard.